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Radio Antennas

The high-frequency signals from the radio transmitters are received via the rear-window aerials (FM1, FM2, FM3 and AM).

The aerial amplifiers are in the Diversity module. There are separate ones for AM and FM.

The combined aerial amplifier and Diversity module is located on the headliner above the rear window, concealed behind a cover.

Both aerial amplifiers are supplied with direct current when the radio is switched on (via terminal Rad_On).

The high-frequency signals from the AM and FM aerials are passed via a ribbon cable from the rear window to the combined aerial amplifier and Diversity module.

Fig 1: Identifying Aerial Amplifier And Diversity Module
G03393761Courtesy of BMW OF NORTH AMERICA, INC.